Hi Diaqad,
First you check either your database , table and column name is utf8 set or not. If these are not set to utf8 then first you set it then you may insert arabic data into you db table.
The following needs to be done for the column Collation in your database
Collation = utf8_general_ci
1. Go to your database
2. Open the table [your database table prefix]_cwp_poll and change the Collation to utf8_general_ci for the fields name, question.
4. Opent the table [your database table prefix]_cwp_poll_answers and change the Collation to utf8_general_ci for the fields answer.
Hope this solves your problem.